Covered-edge plaster board



May 11 1926. 1,584,663

Y' J. scHuMAl-IER COVERED EDGE PLASTER BOARD Filed Nov. 4. 1924 VIVEN T6R. Job/7 cia/mada? B" WMM/7% l 4 TTORNEYS.

' vse scallops 9. .These scallops are of such convention; and Fig.

'with such a covering,

bound thereto. ln the installation of board Peasants n,- 192s.A

UNITED. STATES Joan scnumfefcnnn, or nos ANGELES, oaLrroaNIA.

covEnnn-Enen rnasrnr. 39am).

' .appucamn med November 4, 1924. seria No. 747,794.

This invention relates to plaster board,"

plaster lath and the like, comprising a cem-- entitious core andcovering .sheets of pliable material, such as paper. Such board or lathin the process of manufacture, transportation ot' the finished board,;and installation of thesame, is subjecti td injury and damage at theedges. It has been proposed' to protect the edges with a covering ofpliable material which may by folding over a marginal edge portion of acovering sheet .or by-applying a separate stripfthereto. To eil'ective yprotect the edgeJ the latter should be or lath of this character, it isoften found advantageous to lill the joints with a plaster cement orlike binder. Such joint material does not adhere as effectively tothepaper as to the plaster body. i

.The primary object of this invention is to provide a plaster boardhaving a margin of a covering sheet folded over at'the edge so as toreinforce and protect the latter, the olded portion at the edge beingsuch as to dispose suilicient of the plaster body to provide bindingareas.

These objects together with other objects and rrespondingaccomplishments are obtained by means of the embodiments .of myinvention' illustrated in the accompanying drawing, in which: Fig. 1 isa` perspective view showi a fragment `of a plaster board construcinaccorda-nce with my invention; Fig. 2 is a perspective viewy showing afragment of a board illustrating another form of the'in' 3 is aperspectiveview of a fragment of the board showing still another form ofthe invention. i

Referring more 'particularly to Fig. 1, a plaster body has coveringsheets 6 and 7 of paper bound thereto by means nowA well A known in theart. The edges of the sheets 6 l tend only partially are scalloped as'indicated by 8. The scaldimensions that when toldthe board, they will exlac :roasthe body ofthe plaster. The covering sheet 7 is of the samecharacter as sheet 6 and-is provided with lo s are of such e over theedge of figuration: that areas. of the plaster body are ex PlastercementA applied between the edges of`adjoining Rlasterboard will'contact with the plaster and adhere firmly' imposition, therebyproviding a good joint.-

be accomplished "to lex j '5., plaster board comprising, in combiln Fig.2, a plaster body l0 is shown covered by sheets 11 and 12. The edges ofthe sheets are serrated, teeth being formed which are herein shown asextending nearer thc opposite side of theboard than the scallops 1nFig. 1. These teeth indicated by 13 and 14 arejpreferably arranged tomesh so that there 1s a wavy band of exposed plaster at the edge towhich the "joint cement plaster may adhere.

Instead of the construction shown in'F ig.

2, only one of the'sheets may have serratedf edges. Such a constructionis shown in Fig. 3, the plaster core being indicated by 15, a coveringsheet of the usual form being indicated by 16, and a serrated edge sheetbeing indicated by 17. TheC teeth 18 may be eX- tende-d close to thesheet 16. This construction leaves exposed areas of plaster to which theplaster cement may adhere'.

It is obvious that various other constructions may be employed, that is,the serrations or scallops may be of various configurations. In theclaims appended hereto the terms serrations'or scallops are used broadlyj' without regard to the special configurations.

What I claim is: l. A scribed comprising a cementiticns body and acoveringv sheet disposed on the' facethereof, said covering sheet havingav serrated edge folded over the edge vof said body so as to exposeareas of the latter atthe edge.

scrbed comp 'sm a cementitious body and a coverm s eet disposed on eachface thereplaster board ofthe character de-l y .2. A plaster board ofthe character deof, oneo said covering sheets having serf ratededgesoldedvover the edge oi the body so as to explose' areas of the latter atthe edges.

3. A plaster board of the character described comprising a bod and acovering sheet disposed Pon each da covering sheet having a serratededge folded over theeed e of'said body so as to expose areas of t yelatter at the edge.

f4. A plaster board of the character describedcomprising al lolody,y anda covering 'sheet disposedv on each face thereof, said covering sheetshaving opposite edges serrated and folded over the edges of said' body,said serrations being so disposedv as e areas of the body at the edges.

nation, 'a body of plaster or the 1ike, 4eover ce thereof, saidsheetscovering the opposite faces of said body and adhering thereto, themargins of said sheets being folded to cover the edges of said bodywithout overlapping; said margins being deformed at intervals length-Wise thereof to supply anchorage with the material of said body, theunderformed portions of said margins conforming to the edges of saidbody.

6. A plaster board comprising, in combination, a body of plaster or thelike, cover sheets covering the opposite faces of said body. andadhering thereto, the margins of said sheets being folded to cover theedges of said body without overlapping; said margins being cut out atintervals lengthwise thereof to supply anchorage with the material ofsaid body, the uncut portions of said margins conforming to the edges ofsaid'body.

7. A plaster board comprising, in combination, a body of plaster or thelike, cover sheets covering the opposite faces of said body and adheringthereto, the margins of said sheets being folded to cover the edges ofsaid body without overlapping, said margms being notched at intervalslengthwise thereof to supply anchorage With the material of said body.

8. A plaster board comprising, in combi-v nation, a body of plaster orthe like, cover sheets covering the opposite faces of said body andadhering thereto to'reinforce said body from edge to edge, the marginsof said cover sheets'. being serrated and folded to cover the edges ofsaid body, the serrations of said margins serving to form a mechanicalbond with the body.

9. A plaster board comprising a body, cover sheets applied to the facesof said body and having marginal portions folded over and upon the edgeof said body, said rrargnal portions being serrated along their e ges.

l0. A plaster board comprising a plaster body, sheetspf fibrous materialon opposite sides of said body, the margins of one `of said sheets beingfolded over upon an edge face of said body and provided along its edgewith serrations.

11. A plaster board comprising a plaster body, sheets of fibrousmaterial on opposite sides of said body, the margins @of said sheetsbeing folded over an edge of said body and lterminating in spacedrelation, there being formed longitudinally spaced sei-rationsthroughout said folded portions.

l2. A plaster board comprising a plaster body and sheets of fibrousmaterial covering the faces thereof, the marginal portions of saidsheets being folded over and embedded in the edge face of said body andterminating in spaced relation substantially midway of said edge face,said marginal portions being serrated to provide a bond with thematerial of said body.

In Witness that I claim the foregoing I have hereunto subscribed my namethis 27 th day of October,l 1924. l

v 'JOHN SCHUMACHER.

